Castle Geyser steaming, with Old Faithful erupting behind, in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

photography horizontal color image travel destinations travel unesco world heritage site old faithful geyser heat steam water power in nature yellowstone national park famous place national park usa unesco north america wyoming outdoors day no people landscape forest tree cloud sky outdoor outside nobody no one no person national parks public land landscapes geysers forests trees travel destination tourist destination tourist destinations daytime